CAJ | 학술논문

采用可视化手段研究了水力直径为2.886 mm和0.866 mm的等边三角形截面微小通道内非牛顿流体气液二相垂直上升流动,表观气速0.1-100 m/s,表观液速0.01-6 m/s.根据观察和测量结果,得到三角形通道内的羧甲基纤维素钠(CMC)溶液-氮气的典型流型图像和流型转变界限.通过与常规通道的空气-水二相流型图对比,发现液体的黏性、表面张力以及截面形状和水力直径等因素对流型的转变具有显著的影响.
채용가시화수단연구료수력직경위2.886 mm화0.866 mm적등변삼각형절면미소통도내비우돈류체기액이상수직상승류동,표관기속0.1-100 m/s,표관액속0.01-6 m/s.근거관찰화측량결과,득도삼각형통도내적최갑기섬유소납(CMC)용액-담기적전형류형도상화류형전변계한.통과여상규통도적공기-수이상류형도대비,발현액체적점성、표면장력이급절면형상화수력직경등인소대류형적전변구유현저적영향.
The flow visualization experiments of nitrogen/non-Newtonian fluid two-phase upward flow was carried out in triangular minichannels with the hydraulic diameter of 2.886 mm and 0.866 mm. The gas superficial velocity is 0.1-100 m/s, and the liquid superficial velocity is 0.01-6 m/s. The flow pattern map and the typical flow pattern images of sodium carboxymethyl cellulose (CMC)-nitrogen in triangular minichannels were obtained. The comparisons with the air-water flow pattern of conventional channel show that the viscosity, the surface tension, the cross-section shape and the hydraulic diameter of the fluid have remarkable effect on the flow pattern transition.